sys-libs/zlib media-libs/libpng media-libs/libjpeg-turbo 0 https://github.com/google/butteraugli/archive/290e39552e213ed352761114561f92b93c902f55.tar.gz -> butteraugli-20170116.tar.gz https://github.com/google/butteraugli Apache-2.0 A tool for measuring perceived differences between images ~amd64 6 compile install